NOAA compares sound speeds in water and air
NOAA
NOAA gives approximate speeds of 1,500 metres per second in water and 340 metres per second in air.
Based on: NOAA
Verdict
True
Verification confidenceHigh
Explanation
Yes. Under ordinary conditions, sound travels substantially faster in water than in air. Water transmits sound at roughly 1,500 metres per second, compared with about 340 metres per second in air.
NOAA provides these approximate values. OpenStax independently lists 1,480 metres per second for fresh water at 20°C and 343 metres per second for air at the same temperature. Sound speed depends on the medium's physical properties, including its resistance to compression.
These are reference values, not universal constants. Conditions such as temperature affect the speed. How quickly sound travels is also different from how far it remains detectable: ocean conditions can bend and channel sound over long distances.
Key takeaway
Sound generally travels much faster in water than in air. Its speed and the distance it can travel are different measurements.
Evidence
Supports the claim
An independent physics textbook confirms the difference
OpenStax
OpenStax gives 1,480 metres per second for fresh water at 20°C and 343 metres per second for air at 20°C.
Based on: OpenStax
Reference speeds do not describe every situation
NOAA and OpenStax
Sound speed depends on the medium and its conditions. NOAA separately explains how ocean temperature and pressure influence sound propagation over distance.
Based on: NOAA
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